The 25 MHz reference is fed to the LNB through a dedicated coax run, and 2 further coax runs are used to feed separate horizontal & vertical feeds back to the equipment room.

Receivers

2 separate AirSpy USB SDR Receivers, locked to a 10MHz output from the LeoBodnar GPSDO, are used for the WebSDR and Spectrum monitor.

GPS reference

The GPS reference is a Leo Bodnar unit, running firmware version 1.12, programmed to produced 10 MHz (for the Airspys) and 25 MHz for the LNB. The settings for the reference to produce these 2 frequencies were not straightforward (as the 2 outputs on the Leo Bodnar unit need to be linked) but are here for reference:

Software

Networking

Goonhilly Earth Station has 2x diverse redundant 10Gb links into JANET PoPs. They have been kind enough to give us a dedicated IP address and access to >300Mb/s of up & down bandwidth for use by the station.

A pfsense firewall running on a PC Engines APU2D4 board is used as the station router & firewall.

A high-bandwidth Leo Bodnar NTP Server provides NTP service to the station & the worldwide NTP Pool.